How can the use of $_SESSION arrays in PHP improve the handling of user-specific data in a shop system compared to database storage?

Using $_SESSION arrays in PHP can improve the handling of user-specific data in a shop system compared to database storage by providing a faster and more efficient way to store and retrieve user data without the need for frequent database queries. This can result in quicker response times and reduced server load, especially for frequently accessed user data such as shopping cart contents or user preferences. 

// Start the session
session_start();

// Store user-specific data in $_SESSION array
$_SESSION['user_id'] = 123;
$_SESSION['cart'] = array('item1', 'item2', 'item3');

// Retrieve user-specific data from $_SESSION array
$user_id = $_SESSION['user_id'];
$cart_items = $_SESSION['cart'];

Keywords

$_SESSION arrays PHP user-specific data shop system

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